2019-09-30  Richard Biener  <rguenther@suse.de>

	* gimple.c (gimple_get_lhs): For PHIs return the result.
	* tree-vectorizer.h (vectorizable_live_operation): Also get the
	SLP instance as argument.
	* tree-vect-loop.c (vect_analyze_loop_operations): Also handle
	double-reduction PHIs with vectorizable_lc_phi.
	(vect_analyze_loop_operations): Adjust.
	(vect_create_epilog_for_reduction): Remove all code not dealing
	with reduction LC PHI or epilogue generation.
	(vectorizable_live_operation): Call vect_create_epilog_for_reduction
	for live stmts of reductions.
	* tree-vect-stmts.c (vectorizable_condition): When !for_reduction
	do not handle defs that are not vect_internal_def.
	(can_vectorize_live_stmts): Adjust.
	(vect_analyze_stmt): When the vectorized stmt defined a value
	used on backedges adjust the backedge uses of vectorized PHIs.

From-SVN: r276299